Pencil having a sharpening device for the lead



A. DILLIER Nov. 4, 1930. f

PENCIL HAVING A SHARPENING DEVICE FCR THE LEAD Filed March 28. 1929 3 Sheets-Sheet 1 A. DILLIER 1,780,581

PENCIL HAVING A SHARPENING DEVICE FR THE LEAD Nov. 4, 1930.

Filed March 28. 1929 5"- Sheets-Sheet 2 mm m El A. DILLIER 1,780,581

PENCIL HAVING A SHARPENINGEVICE FOR THE LEAD Nov. 4, 1.930.

Filed March 28. 1929 3 Sheets-Sheet 5 @N KN.

@Mw FMT mi!! il., 1

Y Patented Nov. 4, 19.3()r

" UNITED isfrn'riizfs` PATENT OFFICE ALFRED DILLIER, or Anson/BASEL, `swi'rniiitLAND n PENCIL HAVING A SHARPENING iinvicnfiion 'iranl LEAD n" Application filed March 28, 1929, Serial No. 350,653, and in Germany Aprlr21,r192i8.

In pencils provided with a devicefor mechanically moving the lead outward, vheretofore known, the tendency prevails to avoid the time wasting sharpening of thelead by 5 means of a pocket knife.y `"With this view` in mind the leads were made thin.n But, as the thinnest leads that can be applied with respectto their solidity, are stillvtoo thick to serve for instance las drawing ypencils,;it (has v1,0 already been proposed to depart from` the i thin leads which are used up relatively quickly, andto employ thicker leads" which are to be sharpened bymeans of'a Sharpener,

slid on the projecting portion' of the lead ,15 aiidturnable relatively tothe same, and yto screw this Sharpener onto therear end of the pencil. A

Further, sharpening devices are known, which are housed in the rontpart of the Z0 pencil casingV andconsistof niovably arranged cutting or sharpening'blades, a spe-` i cial devicebeing provided to move these blades into` their ,operativev position.L ...In or-y der to move the lead rinto a position for 25 sharpening it is necessary to retract the saine from its position for. writing by screw means. Other proposed construct-ions also require retractingof the lead by scr-ew means inwhich the sharpening device is arranged in the con- 39 ical part of the pencil casing proper, and in one of these constructions the sharpening oit' the' lead only occurs during the displacement' of, i the lead.` This complicatedprocedurel required .for bringing the sharpening device 35 and the lead in engagement with each other is a great drawback so that these known con-' structions could not be introduced into practice. 1 This drawback is eliminated inthe vpencil according to theinvention, in thatiinl'the latter the conical sleeve together with a guide member is longitudinally displaceable relatively to the rest of the pencil. casing'and Y preferably-noii-detachable from the latter, in

`such manner, as to permit ofV tilting the! parts towards eachother into af positionifor sharpening. Duringthe sharpening opera` tion the position ofthe lead relatively tol its tubular guide remains unchanged, asin this case .the sharpening device is, moved forward enevd;

to` they non-displaced in contradistinc-- tion tothe known farrangementfwhich re-V quiredscrewing the lead backinto a position 0i1k sharpening, r

This.construe,tion -enables,y Avery, quickly' K ascertaining whether the lead is ksharpened sufficiently inthat the;` displaceable .conical sleeve together with tlieguide member need be slid backwards, and if'pfurther sharpening isrequired itis just as quicklyreset into sharpeningposition, V'.[hepencil according to :the presentinvention, therefore, isa considerablel progress in the art,V

In v.the accompanying drawinglseveralfem- Figf'showstheparts iniafposition which they take up' when the lead is being sharp- Fig-l.; efs'hewsfthe rient', embodiment of the invention;`v f

i Figs. 7 and 8show a further. embodiment of the invention inwriting and sharpening po.. j

f Y g 870 Fig. Ilwshows a longitudinal sectionifofa further? embodiment withzthe'partjs ofa peng-v f cil initheirwritingvposition; g

' f Figwl isalsoa longitudinal sectionjshow-` Xviii inFliggtvlif` Y Refer-rin tothe drawings, .l denotes in all the embodiments ofthe :invention the out,-`

erpencil casing, the conical trontpartQ` in the coiistr'uctional example-according to Figs,

l.-5 .e is: threadedly` connectedl te' a coupling member 3 which isadaptedto beppullediout ot the casing and moved intoan inclined position relatively to the l lead l, l pr thisfpur-k 9e lnig. V1'( is a sectionron line XVIIVQXYII pose a supporting member 5 secured to the casing 1 is provided with a tubular extension 6, the forward end of which is flared outwardly, and which serves for a guide for the thickened rear end 8 of the coupling member 3. The inner side of the conical sleeve is provided with an abrading surface 9 which, as shown in Fig. 3, may have sharp indentations but, alternatively, this surfacemay also be coated with emery. The abrading surface is preferably arranged to be exchangeable.Y

The supporting member 5 is further provided with an interior tubular extension 10 which on its frontv end carries an interior screw thread 11. In the tubular extension 10 the lead holding tube 12 is guided which is Hattened on two opposite sides to non-rotatably hold the lead 4 of a corresponding cross-section. The lead holding tube 12 in its front part is rotatably mounted in the tubular extension 100i the supporting'member 5 and in its rear part in an annular bearing member 13 which isconnected to the casing by a cross armed support 14. Tothe rear end of the casing 1 a ferrule 15 is screwed in which a part 17 provided with milled surfaces 16 is rotatably mounted, andthe part 17 carries a square head 18 which engages in the lead holding tube 12. Inturningthe parts 16 and 17 the `lead holding tube 12 and the lead 4 together with it is revolved which latter thereby n preferably is turned in the Yscrew thread, whereby the forward motion of the lead is attained. Y n j IiY the lead is to besharpened, the conical front part 2 together with the coupling member 3 is pulled out of the pencil casing until the bead 8 bears on the outwardly flared `part 7 of the-tubular extension 6; and the sleeve 2 of the casing together with its coupling member=3 is moved into an inclined position relatively to the lead, asl shown in `Fig.l5, the

. klead remaining stationary with respect toits ti'ibular-guide 10. Y By turning the casing 1,V

i. e. the lead 4 relatively to the Vconical sleeve 2 which is to be revolved -in the opposite direction thereto, the abrading surface trims a "sharp point onto the front portion of the lead.

The length of this point can be regulated at will, depending on the extent to which the lead is screwed out of the tubular guide 10. As `soon as ythe end portion of the tubular guidelO bears on the inner wall surfa-Ceof the guide member, the sharpening operation is ceased evenif the parts are further turned relatively to each other. i

The same sharpeningl device also. enables effecting Vof a `flat point if only the cone is turned and the lead is held fast, and subse quent to the trimminglof` the one side of the lead the same is revolved 180O and trimming ofthe opposite side'thereof is continued in thesame manner as before. l d

' In the constructional example according to Figf6 the conical sleeve 22L provided with an in writing position.

abrading surface 9 is liXed to a cylindrical coupling member 3l which is adapted to be slid off the supporting member 5a rigidly ixed in the easing 1. If sharpening of the lead is required the parts 2a and 3iL are slid oli the supporting member 5a and moved to an inclined position relatively to the casing 1 on the front end of the conical part 19 of the supporting member 5a, as indicated in dotted lines. The shoulder 20 formed by the dilerence in the diameters of the part 5a and the rear portionofthe part 19 serves as an abutment guide member for 3Z1 to bear on when the lead is being sharpened.

InA the constructional example according to the Figs. 7 and 8 the conical front part or sleeve 2b provided with an abrading surface 9 is screwed to a cylindrical sleeve 3b and the latter is connected to a further cylindrical Asleeve member 22 by means of a coil spring 21. In this example the supporting member 5b is againV provided with a tubular eX tension 10b which is i'ormed with an external thread as at 23 and which serves as a stop for the sleeve member 22 when the latter together with the conical sleeve 2h is slid outward in the position for sharpening. The spring 21 permits of bringing the conical sleeve r2b in an inclined position relatively to the lead, as shown in Fig. 8, whereupon the sharpening is effected in the manner explained above. fIn this constructional example again tlie Vlead to be sharpened remains Fig. 9 showsa modified form of a lead holding. tube 12b thel one end portion orA which is open on one side as at 24 and which when inserted into the pencil ez;- tends alongside of the magazine 'i'or the leads.

This construction affords of readily exchangzontal the chamber is turned upwards, so that e the llead can'fall intoV the leadliolding tube. To 'permit a preciseadgustment of the Vferrule relatively to the chambers, the outer surface Yof the pencil casing 1 and the part 16, byv Vmeans of which the lead holding tube 12" is turned, are provided with markings 25.

In order vto prevent an undesired falling of alead from the magazine into the lead holding tube 12b which occurs for instance whenthe lead applied is almost usedup, each ico lead is equipped with a metal sleeve 4 (see Fig. 11) within which it is loosely contained.

The sleevey 4 together with the-lead 4 can 'ente-r'the lead holding tube12b, but -it is proportioned so, that 1t is prevented from Lzcircular cross-section or the like.

v 'f' thel other lleads'contained"` the maga:

Zine;

. In the? constructional example according toy FigsflS-vl?, for 'the purposefof-electing a flexible connection, which permits; of tilting the conical sleeve relatively to the casing l,

the rear iend of the coupling' member 3C is formedwith a hollow spherical portion 25 and guided in afcorrespondingly shaped re- Vsleeve 28 bears in its foremost position, as

shown in 14. In this example, 12C denotes thel lead holdingy tube and 11 the in terior threaded portion of the tubular guide 1() for the lead. rllie lead holding tube 12c is flattened on two opposite sides to non-ro'- tatably hold thelead 4 of a corresponding cross section. For the' screw engagement ot' the lead, to move thesame forwards,a square head` 18 serves wliichzprojects in the rlead holding tube and to which is screwed the plug` 15 provided with milled surfaces 16. f

The leads may be. provided with ya coatingk of paper or paint or sonie other material which facilitates cutting the threads therein.

Instead of giving the leads the cross section'v -flattened on two opposite sides, as shown,

tlieymight have any other cross section in order to be non-rotatably held inthe 'errule,

for instance a square, a rectangular, a semi- The conical sleeve may also serve as a protecting device for the lead, in which case the llead need not beretracted atl all,it always remainsrin writing position, whereby thesleeve is slid forward to cover the lead entirely.

I claim:

1. In a pencil of the type described, in

combination, a casing having a conical front part, sharpening means,arranged'inside said conical front part, Vsharpening means arranged inside said conicaly frontpart, means to hold the lead inside the casing, coupling means between said front part andv casing permitting a relative ldisplacement of the `partsr longitudinally and aL relative vtilting of the two lparts into the sharpening position, while the position ofthe lead remains unchanged.

2.1n a pencil. of theltype described,in

combination, a casing having a conical front `part, sharpening means arranged inside said conical front part, inean'sto hold the lead K- inside the casing, a coupling member rigid-V ly fixed to said conical front part and "f guidedv and longitudinally displaceable in said casing, and means connecting'said'coupliiig nieniberto other parts fixed yto said casing, said connecting means permitting a f tilting of said 'conical front part into the sharpeningposition against the lead while the position of the lead after withdrawal of the coupling member. from` the casing re-k mains unchanged. l

3. In a pencil of the type" described,

combination, a casing having a conical front K par t,f sh`arpening means arranged inside said conical front'fpart, vmeans vto hold theglead inside the casing, a coupling member rigidly v iXed-tosaid conicalffront part and guided fand 'longitudinallydisplaceable in said casving`,=`a sleeve insaid casing, andi a-coniiection between said ysleeve and said coupling ineinber'and slidable with ythe latter, a shoulder. on the lead holding meansagainst which said sleeve abuts to limit the with-1Al drawal `ofthe coupling member whilepermit'ting a tilting of said conical front part y into the,y sharpening positionv againstitlie lead lWliilethe position-oli the lead remains unchanged. .Y n f l. l A d. In a pencil of the type described, in

combinatioma "casing having a conical front y part, `sharpening means arranged inside said conical' irontfpart, means to hold the lead kinside the casing, acoupling member rigidly lined toy said conical front part and guided and longitudinally displaceable in said casing, a tubularguide member. in rigid eonnectioii `with vthe casing, a fui-ther sleeve slidiablefon saidjtubular guide member, andaiV flexible* connection 'between said coupling Vmember and-said further-sleeve to permit av tiltingof vsaid conical front' part-against the lead into .the sharpening v'position `while ithe coupling member is withdrawn'- from the casing and the position of the lead remains unchanged. i'.

5. ln a pencil ofthe type describedfin combination, a casing having a conicalfront part, sharpening means arranged ,inside said? conical -frontV part, means to hold they lead Ainside the rcasing, a coupling membersrigidly Xedto saidconical rontpart and guided and longitudinally displaceable in said casing, 'a tubular guide memberl in rigid connection-withthe casing, a further sleevezslidable on said tubular guide member, and a flexible' connection between 1 rsaid coupling `memberjand said Jfurther sleeve comprising a p hollow spherical portion ontherear endfoflilaoy Isaid coupling member and a correspondingly kshaped' recess vprovided on said further sleevewithzwliich that portion engagesto permitatilting of said conical frontjpart lfromv the casing and the position of the lead remains unchanged. f -f againstjlthe leady into the'sharpening positionwhile the couplingmember is Withdrawn 6. In aspencil of thetype described,'in conn ,l

.binatioma casing having ai conical front part,

sharpening means arranged inside said con- Ying of said conical front part against vthe lead into the sharpening'position while the coupling member is withdrawn from the casing and the position of the lead remains unchanged, aiid means to limit the longitudinal -displacement of said conical sleeve relatively to said casing. A

7. In a pencil of the type described in coinbination, a casing having a conical front part, sharpening meansv arranged 'in the front part, lead supporting means in the casing, coupling means between the front part Yin 'eosei portion o n the guide member and an outwardly ilared edge on the sleeve and permitting a tilting of said conical front part against the casing into the sharpening position in which theposition of the lead remains unchanged.

In testimony whereof I have signed my name to this'specification.l y

Y ALFRED DILLIER.

and'casiiig capable of being slid longitudi- Y nally and universally tilted to bring said sharpening means into sharpening engagement with the lead, and means to limit the longitudinal movement of said front part Y and coupling means. Y 8. In a pencil of the type described in coin- -biiiation, a casing, a lead supporting tube mounted therein, 'a longitudinally'movable `sleeve slidably supported on the leadsupporting tube, a front part, abrading means there` iii, coupling means between said front part and said sleeve and permitting universal movement of said front part when longitudi- Anally withdrawn with respect to the casing,

and means to limit the movementV of the coupling means connected to said front part.

9. In a .pencil'of tlie type described, in combination', a casing having a conical front part, sharpening means arranged inside said conical vfront part, means to hold the lead inside the casing, a sleeve guided and loiigitudinally displaceable relatively to said casing, and a coilspring interconnecting said Vconical front part and said sleeve and permitting a tilting of said conical front part against the casing into the'sliarpening position in which tlie `.position of the lead re- Vmains unchanged.

10. In aV pencil ofthe type described, in combination, a casing having a conical iront part,"sliarpening means arranged inside said conical front part,y means to hold the lead inside the casing, a guide member rigidly iixed to said conical front part and Y guidedy andA longitudinally displaceable insaid casing, a sleeve rigidly fixed in said casing,and a flexible connection between said sleeve and vsaid guide .member and comprising a beaded l 

